SSL例程：SSL3_GET_SERVER_CERTIFICATE：证书验证失败

Question

I started receiving error messages a few days and the problem was pointed to this code.

  function doUpload( $cid, $item )
 {
   $torrent = tempnam( '/tmp', 'articles' );

   $handler = fopen( $articles, 'w' );

   $fgetfiles = file_get_contents( ( string ) $item -> enclosure -> attributes() -> url);

   fwrite( $handler,  $fgetfiles );

   fclose( $handler );    

   $description = ( string ) $item -> description;

The error messages I received were

file_get_contents(): Failed to enable crypto in line 77 

the line 77 is shown below

$fgetfiles = file_get_contents( ( string ) $item -> enclosure -> attributes() -> url);

So this were the changes I made after I got this error:

1. I downloaded a CA_Bundle cert and added the path inside php.ini Restarted the server and run the code again but error was still there..

2. I disabled verification of SSL, by adding the code below, but that failed as well.

   curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);

3. Enabled SSL Verification by adding the cert to directory in which script is located and set verification to true but same errors.

   curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);

   curl_setopt($ch, CURLOPT_CAINFO, dirname(FILE) . '/cacert.pem');

I would like to know if there is something I'm not doing right here because the errors I keep receiving are always the same regardless of the changes I make and it all points to

$fgetfiles = file_get_contents( ( string ) $item -> enclosure -> attributes() -> url); //Line 77

I'm currently running this on Nginx + PHP-FPM. Any help would be appreciated.